{"id":1988,"date":"2026-08-10T14:00:00","date_gmt":"2026-08-10T06:00:00","guid":{"rendered":"https:\/\/shenhengglobal.com\/blog\/ais-vs-gis-switchgear-selection\/"},"modified":"2026-08-27T09:55:54","modified_gmt":"2026-08-27T01:55:54","slug":"ais-vs-gis-switchgear-selection","status":"publish","type":"post","link":"https:\/\/shenhengglobal.com\/es\/blog\/ais-vs-gis-switchgear-selection\/","title":{"rendered":"AIS frente a GIS: C\u00f3mo seleccionar aparamenta seg\u00fan el espacio, el mantenimiento y el servicio"},"content":{"rendered":"<div class=\"b2b-article\">\n<p style=\"margin:0 0 16px;line-height:1.7\">Air insulated switchgear (AIS) and gas insulated switchgear (GIS) can both serve medium-voltage distribution. The defensible choice satisfies the project&#8217;s clearances, service method, environment, extension plan and electrical duty. Compare the complete installation, not only cubicle width or price.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"Gas-insulated switchgear\" src=\"https:\/\/shenhengglobal.com\/wp-content\/uploads\/2026\/06\/1.Gas-Insulated-Switchgear.webp\" \/><\/figure>\n<p style=\"margin:0 0 16px;line-height:1.7\">See <a href=\"https:\/\/shenhengglobal.com\/es\/medium-voltage-switchgear\/\">Shenheng Power medium-voltage switchgear<\/a> for the site&#8217;s product families. Keep the single-line diagram and fault study beside this comparison.<\/p>\n<nav class=\"b2b-toc\" style=\"background:#f5f8fa;padding:16px 20px;border-radius:8px;margin:0 0 24px\">\n<h2 id=\"contents\" style=\"margin:42px 0 14px;scroll-margin-top:96px\">Contenido<\/h2>\n<ul style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\"><a href=\"#What-AIS-and-GIS-actually-change\">What AIS and GIS actually change<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#Decide-by-space-and-layout\">Decide by space and layout<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#Compare-maintenance-as-a-work-method\">Compare maintenance as a work method<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#Let-electrical-duty-set-the-gates\">Let electrical duty set the gates<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#RFQ-decision-sheet\">RFQ decision sheet<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#A-switchgear-path-for-constrained-MV-rooms\">A switchgear path for constrained MV rooms<\/a><\/li>\n<\/ul>\n<\/nav>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"What-AIS-and-GIS-actually-change\">What AIS and GIS actually change<\/h2>\n<div class=\"b2b-table-scroll\" role=\"region\" aria-label=\"Tabla de datos desplazable\" tabindex=\"0\" style=\"width:100%;max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 0 18px\">\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Factor<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">AIS<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">GIS<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Boundary<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Insulation<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Air clearances in a metal-enclosed assembly<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Enclosed insulated compartments<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Gas type and pressure are model-specific<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Space<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Room for clearances, cable access and service movement<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Often selected where the complete footprint is constrained<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Use an approved GA drawing<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Servicio<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Accessible panels or withdrawable parts can simplify work<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Sealed compartments require dedicated procedures<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Exact maintenance depends on design<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Environment<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Room cleanliness, humidity and dust control matter<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Enclosure can help in harsh or compact locations<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Confirm enclosure and site limits<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Extension<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Reserve clearances and busbar space<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Specify modules and interfaces early<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Request an extension concept<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Duty<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Breaker class, interlocks and IAC must match<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">The same duty questions plus compartment documentation<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">IEC 62271 and the project study govern<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"Ring main unit and medium-voltage switchgear\" src=\"https:\/\/shenhengglobal.com\/wp-content\/uploads\/2026\/06\/1.Ring-Main-Unit-RMU-MV-Switchgear.webp\" \/><\/figure>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"Decide-by-space-and-layout\">Decide by space and layout<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">GIS is often considered where land or building volume is constrained. Its cubicle width is not the whole footprint: cable boxes, control panels, lifting paths, pressure-relief provisions and maintenance clearances still need space. AIS may need more clearance, while a withdrawable arrangement can make breaker handling easier.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">Ask for a GA drawing showing:<\/p>\n<ul style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\">front and rear service clearances, aisles and door swings;<\/li>\n<li style=\"margin:0 0 8px\">cable trench, gland-plate and termination space;<\/li>\n<li style=\"margin:0 0 8px\">lifting and removal paths for serviceable parts;<\/li>\n<li style=\"margin:0 0 8px\">bus-section, metering and protection interfaces; and<\/li>\n<li style=\"margin:0 0 8px\">reserved bays for future extension.<\/li>\n<\/ul>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"Compare-maintenance-as-a-work-method\">Compare maintenance as a work method<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">For AIS, define inspection access, cleaning, breaker withdrawal, earthing and interlock proving. For GIS, define compartment access, gas-density or pressure monitoring, approved handling equipment and the boundary between factory and site work.<\/p>\n<ol style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\">List outage tasks: inspection, mechanism service, cable testing, relay testing and earthing verification.<\/li>\n<li style=\"margin:0 0 8px\">Mark which tasks require isolation or specialist intervention.<\/li>\n<li style=\"margin:0 0 8px\">Check that room access, lifting equipment, test points, spares and trained personnel support the tasks.<\/li>\n<li style=\"margin:0 0 8px\">Put the method and documentation into the RFQ.<\/li>\n<\/ol>\n<p style=\"margin:0 0 16px;line-height:1.7\">Read <a href=\"https:\/\/shenhengglobal.com\/es\/blog\/medium-voltage-switchgear-explained-components-functions-and-selection-tips\/\">medium-voltage switchgear components and selection<\/a> and the <a href=\"https:\/\/shenhengglobal.com\/es\/blog\/kyn28-gas-insulated-switchgear-buyers-guide\/\">KYN28 buyer guide<\/a> when reviewing candidate documents. Where the network concept includes a ring-fed distribution path, use the <a href=\"https:\/\/shenhengglobal.com\/es\/blog\/ring-main-unit-rmu-selection-guide\/\">RMU selection guide<\/a> to define the separate RMU questions; it does not replace the AIS\/GIS duty and layout review above.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"Let-electrical-duty-set-the-gates\">Let electrical duty set the gates<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">State nominal and highest voltage, normal and emergency load, short-circuit current and duration, making and breaking duty, insulation level, earthing arrangement, internal-arc access category and protection functions. IEC 62271-200 provides the standard context for AC metal-enclosed MV assemblies; the applicable edition belongs in the specification.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">The supplier should return a model-specific schedule covering ratings, type-test evidence, interlocks, cable interfaces, environmental limits and extension boundaries. A GIS label does not remove the need for a fault study, and an AIS label does not prove an internal-arc or breaker duty.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"RFQ-decision-sheet\">RFQ decision sheet<\/h2>\n<ol style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\">One-line diagram, voltage, frequency, phase sequence and transformer interface.<\/li>\n<li style=\"margin:0 0 8px\">Load schedule, motor or converter duty, harmonics and future capacity.<\/li>\n<li style=\"margin:0 0 8px\">Fault level, withstand duration, peak withstand and breaker duties.<\/li>\n<li style=\"margin:0 0 8px\">Insulation levels, internal-arc category and environment class.<\/li>\n<li style=\"margin:0 0 8px\">GA constraints, cable entry, trench, lifting route and service aisles.<\/li>\n<li style=\"margin:0 0 8px\">Maintenance philosophy, outage windows, tools, training and spares.<\/li>\n<li style=\"margin:0 0 8px\">Protection, metering, communications, interlocking and testing.<\/li>\n<li style=\"margin:0 0 8px\">Applicable IEC edition, local code and documentation deliverables.<\/li>\n<\/ol>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"A-switchgear-path-for-constrained-MV-rooms\">A switchgear path for constrained MV rooms<\/h2>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"Medium-voltage gas-insulated switchgear\" src=\"https:\/\/shenhengglobal.com\/wp-content\/uploads\/2026\/07\/1.Gas-Insulated-Switchgear-1.webp\" \/><\/figure>\n<p style=\"margin:0 0 16px;line-height:1.7\">If the room is constrained and the brief points toward a metal-enclosed GIS arrangement, review the <a href=\"https:\/\/shenhengglobal.com\/es\/product\/customized-gas-insulated-switchgear-kyn28-12-12kv-24kv-switchgear-system\/\">Shenheng customized KYN28-12 switchgear system<\/a>. This is a document-request path, not a blanket recommendation. Send duty, GA constraints, cable arrangement, protection schedule, service philosophy and standards, then request the current datasheet, GA drawing, type-test scope, interlock description and extension plan.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"References\">Referencias<\/h2>\n<ul style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/webstore.iec.ch\/publication\/6046\" rel=\"nofollow noopener\" target=\"_blank\">IEC 62271-200 publication overview<\/a> &#8211; standard scope and MV terminology.<\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/www.hitachienergy.com\/products-and-solutions\/high-voltage-switchgear-and-breakers\/gas-insulated-switchgear\" rel=\"nofollow noopener\" target=\"_blank\">Hitachi Energy GIS overview<\/a> &#8211; GIS enclosure and lifecycle context.<\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/www.eaton.com\/us\/en-us\/catalog\/medium-voltage-power-distribution-control-systems\/vacclad-w-metal-clad-switchgear.html\" rel=\"nofollow noopener\" target=\"_blank\">Eaton VacClad-W AIS information<\/a> &#8211; AIS metal-clad architecture.<\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/www.se.com\/ww\/en\/work\/products\/master-ranges\/medium-voltage-switchgear\/\" rel=\"nofollow noopener\" target=\"_blank\">Schneider Electric medium-voltage switchgear<\/a> &#8211; product-family context.<\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/shenhengglobal.com\/es\/medium-voltage-switchgear\/\">Shenheng Power medium-voltage switchgear<\/a> &#8211; product pathway.<\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Compare la aparamenta aislada en aire (AIS) y la aparamenta aislada en gas (GIS) seg\u00fan el espacio, el acceso para mantenimiento, la exposici\u00f3n ambiental y el r\u00e9gimen el\u00e9ctrico antes de su solicitud de cotizaci\u00f3n (RFQ) de media tensi\u00f3n.<\/p>","protected":false},"author":1,"featured_media":2048,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_gspb_post_css":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-1988","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":7}},"acf":[],"_links":{"self":[{"href":"https:\/\/shenhengglobal.com\/es\/wp-json\/wp\/v2\/posts\/1988","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/shenhengglobal.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/shenhengglobal.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/shenhengglobal.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/shenhengglobal.com\/es\/wp-json\/wp\/v2\/comments?post=1988"}],"version-history":[{"count":1,"href":"https:\/\/shenhengglobal.com\/es\/wp-json\/wp\/v2\/posts\/1988\/revisions"}],"predecessor-version":[{"id":2029,"href":"https:\/\/shenhengglobal.com\/es\/wp-json\/wp\/v2\/posts\/1988\/revisions\/2029"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/shenhengglobal.com\/es\/wp-json\/wp\/v2\/media\/2048"}],"wp:attachment":[{"href":"https:\/\/shenhengglobal.com\/es\/wp-json\/wp\/v2\/media?parent=1988"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/shenhengglobal.com\/es\/wp-json\/wp\/v2\/categories?post=1988"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/shenhengglobal.com\/es\/wp-json\/wp\/v2\/tags?post=1988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}